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A 70- \mu m Pitch 8- \mu W Self-Biased Charge-Integration Active Pixel for Digital Mammography

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4 Author(s)
Figueras, R. ; Inst. de Micro Electronicade Barcelona IMB, CSIC, Barcelona, Spain ; Sabadell, J. ; Teres, L. ; Serra-Graells, F.

This paper presents a new low-power compact CMOS active pixel circuit specifically optimized for full-field digital mammography. The proposed digital pixel sensor (DPS) architecture includes self-bias capability at ±10% accuracy, up to 15 nA of dark-current autocalibration, built-in test mechanisms, selectable e-/h+ collection, 10-b lossless charge-integration analog-to-digital conversion, more than 1 decade of individual gain tuning for fixed pattern noise cancellation, and a 50-Mb/s digital-only input/output interface. Experimental results for a 70-μm pitch 8-μW DPS cell example are reported in 0.18-μm CMOS 1-polySi 6-metal technology.

Published in:

Biomedical Circuits and Systems, IEEE Transactions on  (Volume:5 ,  Issue: 5 )

Date of Publication:

Oct. 2011

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